Comprehensive recovery of gold and base-metal sulfide minerals from a low-grade refractory ore |
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Authors: | Wen-juan Li Shuang Liu Yong-sheng Song Jian-kang Wen Gui-ying Zhou Yong Chen |
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Institution: | National Engineering Laboratory of Biohydrometalurgy, General Research Institute for Nonferrous Metals, Beijing 100088, China |
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Abstract: | The comprehensive recovery of small amounts of valuable minerals such as gold and base-metal sulfide minerals from a low-grade refractory ore was investigated. The following treatment strategy was applied to a sample of this ore: gold flotation–gold concentrate leaching–lead and zinc flotation from the gold concentrate leaching residue. Closed-circuit trials of gold flotation yielded a gold concentrate that assayed at 40.23 g·t?1 Au with a recovery of 86.25%. The gold concentrate leaching rate was 98.76%. Two variants of lead-zinc flotation from the residue—preferential flotation of lead and zinc and bulk flotation of lead and zinc—were tested using the middling processing method. Foam from the reflotation was returned to the lead rougher flotation or lead–zinc bulk flotation, whereas middlings from reflotation were discarded. Sulfur concentrate was a byproduct. The combined strategy of flotation, leaching, and flotation is recommended for the treatment of this kind of ore. |
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Keywords: | comprehensive recovery gold sulfide minerals mineralogy refractory ore treatment |
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